نتایج جستجو برای: maastrichtian

تعداد نتایج: 629  

Journal: :Biologia 2021

A historic specimen described for the first time revealed important autapomorphic characters, permitting definition of a new species, Javelinadactylus sagebieli gen. n. et sp. n., which represents second toothless species from Javelina Formation, Big Bend National Park West Texas (United States America). The remains J. (Azhdarchoidea: Tapejaridae) were found in 1986, but never properly studied,...

Journal: :European journal of environment and earth sciences 2022

The Maastrichtian–Eocene sediments (mainly shales and limestones) penetrated by the Itori borehole Ilaro boreholes in Dahomey Basin were investigated for foraminiferal biostratigraphy palaeoecological interpretation. These Araromi, Ewekoro, Oshosun formations at varying depths. Selected shale subjected to analysis many planktonic benthic species of foraminifera (agglutinated calcareous) recover...

Journal: :Geologie En Mijnbouw 2023

Abstract A mandible of a Late Cretaceous sea turtle with affinities to Ctenochelys is reported from the Maastrichtian type area Netherlands. The triangular has well-developed symphyseal ridge surrounded on both sides by large, concave areas triturating surface. It represents first potential occurrence area. This finding increases diversity fauna known

2014
Caroline E. Sogot Elizabeth M. Harper Paul D. Taylor

Consistent trends towards decreasing body size in the aftermath of mass extinctions--Lilliput effects--imply a predictable response among unitary animals to these events. The occurrence of Lilliput effects has yet to be widely tested in colonial organisms, which are of particular interest as size change may potentially occur at the two hierarchical levels of the colony and the individual zooids...

2017
Darren Naish Mark P. Witton

Azhdarchid pterosaurs include the largest animals to ever take to the skies with some species exceeding 10 metres in wingspan and 220 kg in mass. Associated skeletons show that azhdarchids were long-necked, long-jawed predators that combined a wing planform suited for soaring with limb adaptations indicative of quadrupedal terrestrial foraging. The postcranial proportions of the group have been...

Journal: :The Paleontological Society Special Publications 1996

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